When Were Gravitational Waves First Detected?

💡 The Answer

• The first direct detection happened on September 14, 2015, by LIGO.
• The signal came from two merging black holes 1.3 billion light-years away.
• Gravitational waves are ripples in spacetime predicted by Einstein in 1916.
• This discovery earned the 2017 Nobel Prize in Physics for LIGO's founders.